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A diagonal of A059438.
3

%I #8 Jun 25 2019 09:12:46

%S 1,3,12,58,327,2109,15366,125316,1135329,11348623,124359336,

%T 1484796894,19204214363,267627706257,3998828758938,63777662250440,

%U 1081442839245381,19426122224995107,368492543629967292

%N A diagonal of A059438.

%D L. Comtet, Advanced Combinatorics, Reidel, 1974, p. 262 (#14).

%H Vaclav Kotesovec, <a href="/A059440/b059440.txt">Table of n, a(n) for n = 3..400</a>

%F G.f.: (1-1/Sum (k! x^k ))^3.

%F a(n) ~ 3*sqrt(2*Pi) * n^(n - 3/2) / exp(n). - _Vaclav Kotesovec_, Jun 25 2019

%K nonn,easy

%O 3,2

%A _N. J. A. Sloane_, Feb 01 2001

%E More terms from _Vladeta Jovovic_, Mar 04 2001